<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
error
<P id="app">{{msg}<p/>
</body>

<script>
    new Vue({
        el: '#app',
        data: {
            message: msg
        }
    })
</script>
</html>